LIC5A-Conclusion

= Long Island Creek Site 5A = = Conclusion =

Being located within a private residence, Long Island Creek site 5A is predominantly in good health. The chemical and physical parameters indicate fairly stable conditions throughout monitoring. Both pH and dissolved oxygen values were consistently in the healthy range for waterbodies. Additionally, test results for nitrates and phosphates were negative throughout the study. While coliform bacteria spiked heavily after heavy rain, they quickly returned to what appeared to be consistent, low numbers expected at a low-density residential area. The most alarming E. coli coliform count came from the first water collection on 12 June 2012, a day after heavy rain in the Sandy Springs area. Trees monitored at Long Island Creek 5A have a risk rating range from 3 to 5, indicating overall seemingly healthy trees. Two of the selected trees are dead possibly due to stream bank erosion, however their probability of impact is low as they are located in areas of occasional use. Stream bank restoration carried out since last year's watershed assessment project is seemingly mitigating the effects of bank erosion and improving stream health both on site and downstream. However, it is evident that the intense heat and lack of rainfall over the majority of the monitoring period caused a downward trending stream discharge at this site. During the group's last visit, over four dozens of fish kills were observed on site. The groups hypothesizes this could be due to the recent dry weather and low discharge levels, which increase the probability of higher water temperatures. Nevertheless, the overall impression of Long Island Creek site 5 is that it is in healthy conditions.

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